This is an extremely rare Japanese WW2 military sake cup, decorated with three flags. The center one is a Japanese flag. The design of the other two are a bit puzzling. I believe the two surrounding it are the flags for Mengjiang - the Mongolian puppet state - and what looks like some kind of variant of one of the provinces of the provisional governments of Shanxi province. It is also possible that the flag on the left is the five striped Provisional Government of China flag - but the color pattern is odd. So is the flag on the right - it's not the Manchukuo flag, since it's got vertical stripes in the top quarter, rather than horizontal. 

The words are "Commemoration". The words in the bottom is "Kusagawa unit" and the words around the rim are "Showa 15th Year February". Anything from 1940 onwards, especially related to military activities, is very rare, as units generally didn't make it home and the ones who did came home as defeated soldiers. The cup comes with original box with the words "Commemoration" "Kusagawa unit" embossed on the lid, and the name of the shop that sold it in a label under the lid.

Condition: Excellent - light scratches of the gold

Size: 3.25" across